100 CAMBBIA STEEL. 



TABLES OF SAFE LOADS FOR CAMBRIA SEC- 

 TIONS USED AS BEAMS, AND SPACING 

 FOR CAMBRIA I-BEAMS. 



Pagesl06 to 159 inclusive. 

 TABLES OF SAFE LOADS AND SPACINGS. 



The Tables of Safe Loads for Cambria I-Beams, Channels, and 

 Angles, give the safe loads in pounds uniformly distributed for 

 all usual spans based upon extreme fibre stresses of 16 000 pounds 

 per square inch. 



These loads include the weight of the steel shape itself, which 

 should be deducted in order to obtain the external load that it 

 will safely carry. In case the shape is used to support a floor, 

 the weight of the steel, together with that of the other portions 

 of the floor construction, must be deducted in order to obtain the 

 net live load which can be safely sustained. Weights of hollow 

 tile floor arches and fireproofing material are given on page 69. 

 to which should be added the weight of plastering, filling on top 

 of arches and the weight of the material forming the surface of the 

 floor, in order to obtain the dead load of materials in figuring 

 fireproof floors, in addition to the weight of the steel. 



A table of superimposed loads per square foot, exclusive of the 

 weights of materials, in accordance with the usual practice for 

 different classes of buildings, is given on p. 52. 



The Tables of Safe Loads for Cambria sections used as beams 

 and the Tables for Spacing of Cambria I-Beams are calculated on 

 the assumption that proper provision has been made for prevent- 

 ing lateral deflection by means of tie-rods or other braces spaced 

 at suitable distances apart; which for beams and channels should 

 not exceed twenty times the flange width. In cases where inter- 

 mediate lateral support is not provided, the safe loads shown in 

 the tables must be reduced, and for beams and channels the 



